1 files changed, 71 insertions, 0 deletions
diff --git a/www/wiki/extensions/SemanticMediaWiki/src/Deserializers/DVDescriptionDeserializer/DispatchingDescriptionDeserializer.php b/www/wiki/extensions/SemanticMediaWiki/src/Deserializers/DVDescriptionDeserializer/DispatchingDescriptionDeserializer.php
new file mode 100644
index 00000000..5d803064
--- /dev/null
+++ b/www/wiki/extensions/SemanticMediaWiki/src/Deserializers/DVDescriptionDeserializer/DispatchingDescriptionDeserializer.php
@@ -0,0 +1,71 @@
+<?php
+
+namespace SMW\Deserializers\DVDescriptionDeserializer;
+
+use RuntimeException;
+use SMWDataValue as DataValue;
+
+/**
+ * @private
+ *
+ * @license GNU GPL v2+
+ * @since 2.3
+ *
+ * @author mwjames
+ */
+class DispatchingDescriptionDeserializer {
+
+	/**
+	 * @var DescriptionDeserializer[]
+	 */
+	private $descriptionDeserializers = [];
+
+	/**
+	 * @var DescriptionDeserializer
+	 */
+	private $defaultDescriptionDeserializer = null;
+
+	/**
+	 * @since  2.3
+	 *
+	 * @param DescriptionDeserializer $descriptionDeserializer
+	 */
+	public function addDescriptionDeserializer( DescriptionDeserializer $descriptionDeserializer ) {
+		$this->descriptionDeserializers[] = $descriptionDeserializer;
+	}
+
+	/**
+	 * @since 2.3
+	 *
+	 * @param DescriptionDeserializer $defaultDescriptionDeserializer
+	 */
+	public function addDefaultDescriptionDeserializer( DescriptionDeserializer $defaultDescriptionDeserializer ) {
+		$this->defaultDescriptionDeserializer = $defaultDescriptionDeserializer;
+	}
+
+	/**
+	 * @since 2.3
+	 *
+	 * @param DataValue $dataValue
+	 *
+	 * @return DescriptionDeserializer
+	 * @throws RuntimeException
+	 */
+	public function getDescriptionDeserializerBy( DataValue $dataValue ) {
+
+		foreach ( $this->descriptionDeserializers as $descriptionDeserializer ) {
+			if ( $descriptionDeserializer->isDeserializerFor( $dataValue ) ) {
+				$descriptionDeserializer->setDataValue( $dataValue );
+				return $descriptionDeserializer;
+			}
+		}
+
+		if ( $this->defaultDescriptionDeserializer !== null && $this->defaultDescriptionDeserializer->isDeserializerFor( $dataValue ) ) {
+			$this->defaultDescriptionDeserializer->setDataValue( $dataValue );
+			return $this->defaultDescriptionDeserializer;
+		}
+
+		throw new RuntimeException( "Missing registered DescriptionDeserializer." );
+	}
+
+}